BM1366, BM1368, BM1370, BM1373: which chip is in your miner?
Every Bitaxe-style miner is built around one or more Bitmain mining chips. The chip decides how much power the miner needs for each unit of work. Here's which chip is in each home miner we track, and what it costs today.
1. The short answer
- The chip number goes up with each new generation. In our data, each newer chip uses less electricity per TH/s.
- More chips means more hashrate, not better efficiency. A 4-chip board makes about 4 times the hashrate and uses about 4 times the power.
- Most boards on sale today use the BM1370. The BM1373 is the newest chip we see in shops.
Example: a Bitaxe Gamma (BM1370) uses about 15 joules per TH/s, and a Bitaxe Naja Duo (BM1373) about 10. For the same hashrate, the Bitaxe Naja Duo uses about 36% less electricity.
2. The chips side by side
| Chip | Miners we track | Power per TH/s | Cheapest in stock |
|---|---|---|---|
| BM1366 | 1 | 24 J/TH | $119.99 (Bitaxe Ultra) |
| BM1368 | 2 | 21 to 23 J/TH | $119.99 (Bitaxe Supra) |
| BM1370 | 11 | 15 to 20 J/TH | €100.00 (Bitaxe Gamma) |
| BM1373 | 4 | 10 to 13 J/TH | $385.00 (Bitaxe Naja Duo) |
Efficiency is the seller-stated power divided by the seller-stated hashrate. Lower J/TH means less electricity for the same work.
3. Every miner, by chip
BM1366 miners
| Miner | Chips | Hashrate | Power | Efficiency | Power cost a year | Cheapest in stock | Price per TH/s |
|---|---|---|---|---|---|---|---|
| Bitaxe Ultra | 1 | 0.5 TH/s | 12 W | 24 J/TH | $16 | $119.99 at Bitcoin Merch | $240 |
BM1368 miners
| Miner | Chips | Hashrate | Power | Efficiency | Power cost a year | Cheapest in stock | Price per TH/s |
|---|---|---|---|---|---|---|---|
| Bitaxe 702 | 6 | 4.2 TH/s | 90 W | 21 J/TH | $118 | Out of stock | – |
| Bitaxe Supra | 1 | 0.65 TH/s | 15 W | 23 J/TH | $20 | $119.99 at Bitcoin Merch | $185 |
BM1370 miners
| Miner | Chips | Hashrate | Power | Efficiency | Power cost a year | Cheapest in stock | Price per TH/s |
|---|---|---|---|---|---|---|---|
| Bitaxe Gamma | 1 | 1.2 TH/s | 18 W | 15 J/TH | $24 | €100.00 at Power Mining | $94 |
| Nerdaxe Gamma | 1 | 1.2 TH/s | 18 W | 15 J/TH | $24 | €139.00 at Power Mining | $131 |
| BitForge Nano | 2 | 2.6 TH/s | 40 W | 15 J/TH | $53 | $169.99 at DTV Electronics | $65 |
| Bitaxe Gamma Duo | 2 | 1.63 TH/s | 26 W | 16 J/TH | $34 | $239.99 at Bitcoin Merch | $147 |
| Bitaxe Gamma Hex | 6 | 8.4 TH/s | 140 W | 17 J/TH | $184 | $449.99 at Bitcoin Merch | $54 |
| NerdQaxe++ | 4 | 4.8 TH/s | 80 W | 17 J/TH | $105 | $210.99 at Solo Satoshi | $44 |
| NerdOCTaxe Gamma | 8 | 9.6 TH/s | 160 W | 17 J/TH | $210 | $424.99 at Bitcoin Merch | $44 |
| Bitaxe Touch | 1 | 1 TH/s | 17 W | 17 J/TH | $22 | $499.99 at Bitcoin Merch | $500 |
| NerdQX | 4 | 8.1 TH/s | 138 W | 17 J/TH | $181 | $449.99 at Bitcoin Merch | $56 |
| Heatbit Bitwater | 20 | 34 TH/s | 600 W | 18 J/TH | $788 | Out of stock | – |
| Bitaxe GT 801 | 2 | 2.15 TH/s | 43 W | 20 J/TH | $57 | $174.99 at Bitcoin Merch | $81 |
BM1373 miners
| Miner | Chips | Hashrate | Power | Efficiency | Power cost a year | Cheapest in stock | Price per TH/s |
|---|---|---|---|---|---|---|---|
| Bitaxe Naja Duo | 2 | 4.4 TH/s | 42 W | 10 J/TH | $55 | $385.00 at Solo Satoshi | $88 |
| Nerdaxe Gaia | 1 | 2.6 TH/s | 25 W | 10 J/TH | $33 | $399.99 at Bitcoin Merch | $154 |
| Gaia Copper Pro | 1 | 3 TH/s | 33 W | 11 J/TH | $43 | Out of stock | – |
| NMQAxe++ Nexus | 2 | 8.5 TH/s | 110 W | 13 J/TH | $145 | $399.00 at NMMiner | $47 |
Hashrate and power are what sellers state for each model. Power cost assumes $0.15/kWh, running 24/7. Prices are the cheapest in-stock offer we found at Nov 5, 2026 1:46 AM ET.
4. How to pick
- Cheap electricity (under about $0.10/kWh): go for the lowest price per TH/s. See the price per TH/s leaderboard.
- Expensive electricity: a lower J/TH saves money every month. Check the power cost column.
- Just want a lottery ticket: any single-chip board works. See best under $100.
Questions
Which chip does the Bitaxe Gamma use?
One BM1370. Most current Bitaxe and NerdQaxe boards use the BM1370; boards with more chips simply have more of them.
What does J/TH mean?
Joules per terahash: how much electricity a miner uses for each unit of work. Lower is better. It's the stated watts divided by the stated TH/s.
Should I wait for a newer chip?
Newer chips use less power per TH/s, but they don't always cost less per TH/s, so compare both columns above. If your electricity is cheap, the cheapest price per TH/s matters most. If it's expensive, a lower J/TH saves more over a year.
Is a BM1366 Bitaxe Ultra still worth buying?
Only if it's cheap. It uses noticeably more power per TH/s than a BM1370 board, so compare its price per TH/s and yearly power cost in the tables above.
Why are these numbers different from my miner's dashboard?
They're what sellers state for each model. Your miner's real hashrate and power depend on its frequency, voltage, cooling and power supply.